| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent leakage from clearance between blocks arranged in a vertically stacked state and to prevent the damage of watertight rubber during installation on the field. SOLUTION: Side door stops 3 are installed on a reservoir side concrete surface 2a of a dam body 2 through a watertight hardware. A bottom door stop 3 is installed on a reservoir side horizontal part 2b of the dam body 2 through a watertight hardware. A caisson 11 is installed in a stacked state on top of the bottom door stop 3 at the side door stops 4 through leg parts. A watertight hardware 12 is welded to the front face lower part of each block 11a of the caisson 11, and a bracket metal 8 is welded to the front face upper part. A water swelling rubber 13 and a spacer 14 are fitted in this order from the front face side to the contact face of the watertight hardware 12 with the bracket metal 8. The height of the water swelling rubber 13 is made slightly lower than that of the spacer 14. Manufacturing accuracy is thereby improved to effectively prevent leakage from clearance between upper and lower blocks. The number of parts for a watertight part on the front side can be reduced, and working time can be shortened to reduce a cost. Watertight rubber is not damaged during installation on the field.
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